package com.youmans.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.youmans.eduservice.entity.EduSubject;
import com.youmans.eduservice.entity.excel.SubjectData;
import com.youmans.eduservice.service.EduSubjectService;
import com.youmans.servicebase.exceptionHandler.GuliException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    //因为SubjectExcelListener不能交给spring管理，需要自己new
    public EduSubjectService subjectService ;

    public SubjectExcelListener() {}

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    //一行一行读取
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData == null){
            throw new GuliException(20001,"文件数据为空");
        }

        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject == null){//没有相同一级分类，进行添加
            existOneSubject = new EduSubject() ;
            existOneSubject.setParentId("0") ;
            existOneSubject.setTitle(subjectData.getOneSubjectName()) ;
            subjectService.save(existOneSubject);
        }

//        获取一级分类id值
        String pid = existOneSubject.getId();
        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if(existTwoSubject == null){
            existTwoSubject = new EduSubject() ;
            existTwoSubject.setParentId(pid) ;
            existTwoSubject.setTitle(subjectData.getTwoSubjectName()) ;
            subjectService.save(existTwoSubject);
        }

    }
    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>() ;
        wrapper.eq("title",name) ;
        wrapper.eq("parent_id","0") ;
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject ;
    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>() ;
        wrapper.eq("title",name) ;
        wrapper.eq("parent_id",pid) ;
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject ;
    }



    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
